The Marianist religious order said it will look into how a former brother accused in more than 20 lawsuits of subduing former students with ether before sexually abusing them was transferred to Colorado from Missouri in the 1960s.

The Pueblo Chieftain reported in Thursday editions that a 56-year-old St. Louis man filed a police report in Kirkwood, Mo., in 2005, alleging that William Mueller sexually assaulted him while he attended Vianney High School from 1965 to 1969.

According to the report, the man told a school administrator about Mueller’s activities in late 1965 and early 1966. The man told police that he was gassed by Mueller on three occasions. The former student said he did not suspect sexual assault until the third incident.

Mueller was transferred to Pueblo in 1966, where he taught at Roncalli High School until it closed in 1971. Twenty-two former students there have filed lawsuits against the Marianist order and the Pueblo Catholic Diocese, which operated the all-boys school.

Diane Guerra, spokeswoman for the Marianist Province of the United States, said Wednesday that she would research Mueller’s assignment to Pueblo.

The latest suit against Mueller involves a 52-year-old man, known as “John Doe No. 18,” who now lives in Arapahoe County.